org.jikesrvm.mm.mmtk

Class Collection

java.lang.Object

org.mmtk.vm.Collection

org.jikesrvm.mm.mmtk.Collection

public class Collection
extends Collection

Field Summary

Fields

Modifier and Type	Field and Description
private static RVMThread.SoftHandshakeVisitor	mutatorFlushVisitor

Fields inherited from class org.mmtk.vm.Collection

EXTERNAL_GC_TRIGGER, INTERNAL_GC_TRIGGER, INTERNAL_PHASE_GC_TRIGGER, RESOURCE_GC_TRIGGER, TRIGGER_REASONS, triggerReasons, UNKNOWN_GC_TRIGGER

Constructor Summary

Constructors

Constructor and Description
Collection()

Method Summary

Modifier and Type	Method and Description
void	blockForGC() Block for the garbage collector.
int	getActiveThreads()
int	getDefaultThreads()
void	outOfMemory() Fail with an out of memory error.
void	prepareMutator(MutatorContext m) Prepare a mutator for collection.
void	requestMutatorFlush() Request each mutator flush remembered sets.
void	resumeAllMutators() Resume all mutators blocked for GC.
static void	scheduleFinalizerThread() Schedule the finalizerThread, if there are objects to be finalized and the finalizerThread is on its queue (ie. currently idle).
void	spawnCollectorContext(CollectorContext context) Spawns a thread to execute the supplied collector context.
void	stopAllMutators() Stop all mutator threads.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

mutatorFlushVisitor

private static RVMThread.SoftHandshakeVisitor mutatorFlushVisitor

Constructor Detail

Collection

public Collection()

Method Detail

spawnCollectorContext

public void spawnCollectorContext(CollectorContext context)

Spawns a thread to execute the supplied collector context.

Specified by:

spawnCollectorContext in class Collection

Parameters:

context - the context to execute

getDefaultThreads

public int getDefaultThreads()

Specified by:

getDefaultThreads in class Collection

Returns:

The default number of collector threads to use.

getActiveThreads

public int getActiveThreads()

Specified by:

getActiveThreads in class Collection

Returns:

The number of active threads.

blockForGC

public void blockForGC()

Description copied from class: Collection

Block for the garbage collector.

Specified by:

blockForGC in class Collection

outOfMemory

public void outOfMemory()

Fail with an out of memory error.

Specified by:

outOfMemory in class Collection

prepareMutator

public final void prepareMutator(MutatorContext m)

Description copied from class: Collection

Prepare a mutator for collection.

Specified by:

prepareMutator in class Collection

Parameters:

m - the mutator to prepare

stopAllMutators

public void stopAllMutators()

Description copied from class: Collection

Stop all mutator threads. This is current intended to be run by a single thread.

Fixpoint until there are no threads that we haven't blocked. Fixpoint is needed to catch the (unlikely) case that a thread spawns another thread while we are waiting.

Specified by:

stopAllMutators in class Collection

resumeAllMutators

public void resumeAllMutators()

Description copied from class: Collection

Resume all mutators blocked for GC.

Specified by:

resumeAllMutators in class Collection

requestMutatorFlush

public void requestMutatorFlush()

Description copied from class: Collection

Request each mutator flush remembered sets. This method will trigger the flush and then yield until all processors have flushed.

Specified by:

requestMutatorFlush in class Collection

scheduleFinalizerThread

public static void scheduleFinalizerThread()

Schedule the finalizerThread, if there are objects to be finalized and the finalizerThread is on its queue (ie. currently idle). Should be called at the end of GC after moveToFinalizable has been called, and before mutators are allowed to run.